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Finally, consider the extinction of the Java tiger. Habitat for these beasts has been so constricted over the past half century by population pressure and poverty-driven fuelwood harvests that, at most two were left by the year 2,000. Now the Java Tiger is considered extinct.

Ignorance

Ignorance, or better said, the absence, or inaccessibility of good scientific and ecological information, underlies much environmental degradation in Indonesia, just as elsewhere.

Ignorance about key determinants of the fragile ecology of tropical forests prevented Indonesia, Brazil and other countries from knowing how to utilize the renewable products and services of natural forests in a sustainable way. Some countries, fortunately not Indonesia, do not even keep statistics on the value of production and exports of the non-wood forest products that can be harvested without cutting down trees. These non-wood products include food, for both plants and animals, traditional medicines from forest: herbs, vines and drugs.

Catastrophe and the role of ignorance: tropical forestry

Very large scale exploration of tropical forests began only in 1946 first in the Philippines, amidst virtually complete ignorance of ecology of the tropical forest. It is now widely recognized that this ecology is fragile and complex, but otherwise not much ignorance about it has been dispelled. Even now little is known about such vital ecological issues as what happens in regeneration of cut-over or cleared stands, flowering and fruiting in the natural forest or the role of forest animals in seed distribution. This is because some tropical trees flower only at 30 year intervals. This is not irrelevant in efforts to understanding forest ecology.

Second, a high degree of ignorance remains regarding the effects of human encroachment upon natural tropical forests. This is because information on the economic as well as the environmental impact of the forest utilization is grossly incomplete and deeply flawed. We will see that these flaws are particularly glaring in systems of national income accounting used by all nations. Consequently, there is a clear bias in decisions about forest utilization, in favor of activities most corrosive of the long-term value of tropical forest assets. We will discuss this later.

The problem has not been confined to Indonesia. And as noted earlier, until recently ignorance was almost total everywhere regarding the fertility of deforested tropical timber land. Now, we know in Brazil that such soil has the color of cement, and is not much richer in nutrients than cement.

Brazil's forests

There are many lessons to be learned from Brazil’s experiences with their tropical forests since 1960.

Brazil’s tropical forest is the largest on earth.

Consider the distance between Chicago and Juneau, Alaska. This is the size of the Brazilian State if Amazonas, almost all of which is or was forest. But Amazonas contains only part of the forest, there was a very large forest areas in the adjacent states of Para, Amapa and Mata Grasso.

For about 3 decades, deforestation raged in Brazil, but there was mostly studied ignorance about it among Government officials in Rio de Janeiro and Brasilia, the nation’s capital.

Between 1980 to 2006, 17% of the Forest vanished, as intact forests.

Put into perspective, this means that in Brazil, every year a chunk of forest equal to an average state in U.S. disappeared.

Just in 2004, over 16,000 square miles of forest vanished – an area twice the size of Massachusetts. In 2004, at least a billion, perhaps 1.3 billion trees fell to the chainsaw or the bulldozers. (U.S. News, Feb. 12, 2007). Even by 2013, about 2,256 square miles of Brazilian tropical forest was lost to deforestation in that one year.

Consider another consequence of ignorance about tropical forest. Consider this statement by Whitmore in 1974, in his Tropical Forests of the Fareast:

“Finally it must be noted that many forest mammals, especially monkeys and apes, harbor diseases caused by arboviruses and borne by mosquitoes and ticks, for example dengue fever . When the forest is logged, these diseases are easily transmitted to man and carried by him to urban areas where they can cause epidemics (Knudsen 1977; Lim, Muul, and Chai 1977).”

Prophetic.

It is now fairly certain that the AIDS virus, jumped from apes to man in the Central African Rain Forest.

Questions & Answers

Do somebody tell me a best nano engineering book for beginners?
s. Reply
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
China
Cied
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
what is the k.e before it land
Yasmin
what is the function of carbon nanotubes?
Cesar
I'm interested in nanotube
Uday
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
AMJAD
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
AMJAD
what is system testing
AMJAD
what is the application of nanotechnology?
Stotaw
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
Azam
anybody can imagine what will be happen after 100 years from now in nano tech world
Prasenjit
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
Azam
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
Prasenjit
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
Damian
silver nanoparticles could handle the job?
Damian
not now but maybe in future only AgNP maybe any other nanomaterials
Azam
Hello
Uday
I'm interested in Nanotube
Uday
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
Prasenjit
can nanotechnology change the direction of the face of the world
Prasenjit Reply
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
Ali Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Economic development for the 21st century. OpenStax CNX. Jun 05, 2015 Download for free at http://legacy.cnx.org/content/col11747/1.12
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